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CVE-2025-13591

CVE-2025-13591 · Username Enumeration via Authentication Endpoint in WSO2 Identity Server Allows User Account Discovery

This page contains facts from public vulnerability sources. Check the original advisory before updating.

The authentication endpoint of WSO2 Identity Server fails to provide a consistent system response when a username does not exist in the system, allowing attackers to differentiate between valid and invalid usernames. This difference in responses can be leveraged to enumerate existing user accounts. Successful exploitation enables an attacker to discover valid usernames within the system, significantly increasing the risk of subsequent attacks such as brute force attacks on user credentials, social engineering attacks, and information leakage. The discovered usernames can be used to craft targeted phishing emails or other social engineering campaigns.

CVSS 5.3 · Medium · EPSS 0.2% · Fix available

Published
Updated

Affected products and versions

  • wso2 identity server

    Versions
    • ≥ 0, < 7.0.0: Unknown (custom)
    • ≥ 7.0.0, < 7.0.0.134: Affected (custom)
    • ≥ 7.1.0, < 7.1.0.42: Affected (custom)

    Update to 7.0.0.134; Update to 7.1.0.42

  • wso2 carbon abstract otp authenticator

    Versions
    • ≥ 1.0.5, < 1.0.5.3: Affected (custom)
    • ≥ 1.0.10, < 1.0.10.2: Affected (custom)

    Update to 1.0.10.2; Update to 1.0.5.3

  • email otp authenticator

    Versions
    • ≥ 1.0.18, < 1.0.18.8: Affected (custom)
    • ≥ 1.0.30, < 1.0.30.5: Affected (custom)

    Update to 1.0.18.8; Update to 1.0.30.5

Original sources

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